This doesn't solve your problem, but for anyone else reading who may not be aware - there is (at least one) library that does runtime checking with your type hi

This doesn't solve your problem, but for anyone else reading who may not be aware - there is (at least one) library that does runtime checking with your type hints: https://typeguard.readthedocs.io/en/latest/userguide.html#using-the-pytest-plugin https://typeguard.readthedocs.io/en/latest/userguide.html#us...